2978678406 has 32 divisors (see below), whose sum is σ = 6503328000. Its totient is φ = 902019680.

The previous prime is 2978678371. The next prime is 2978678449. The reversal of 2978678406 is 6048768792.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88420 + ... + 117368.

It is an arithmetic number, because the mean of its divisors is an integer number (203229000).

Almost surely, 2^2978678406 is an apocalyptic number.

2978678406 is an abundant number, since it is smaller than the sum of its proper divisors (3524649594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2978678406 is a wasteful number, since it uses less digits than its factorization.

2978678406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30524.

The product of its (nonzero) digits is 8128512, while the sum is 57.

The square root of 2978678406 is about 54577.2700489865. The cubic root of 2978678406 is about 1438.8246591858.

The spelling of 2978678406 in words is "two billion, nine hundred seventy-eight million, six hundred seventy-eight thousand, four hundred six".